harp in WordNet English dictionary

1. come back to
   "Don't dwell on the past"; "She is always harping on the same old things"
   harp  dwell 
   
2. play the harp
   "She harped the Saint-Saens beautifully"
   harp 
   

1. a small rectangular free-reed instrument having a row of free reeds set back in air holes and played by blowing into the desired hole
   harmonica  mouth organ  harp  mouth harp 
   
2. a chordophone that has a triangular frame consisting of a sounding board and a pillar and a curved neck; the strings stretched between the neck and the soundbox are plucked with the fingers
   harp 
   
3. a pair of curved vertical supports for a lampshade
   harp